Had my X8 for over 4 years---Got to give X8 over 5 Star Rating. Had electronic air filters in my life for 60 years (many different manufacturers) and Airdog is the Best over all performance of air filters. Never mind all the other manufacturers and don't waste your money . INVEST in an Airdog product.

In comparison to our Airdog 3, our AIrdog 8 seemed to have a pretty high profile when we first installed it. But after living with it for a while, it fits right in and does the job effectively, subtly, quietly, and reliably. We haven't had to clean it yet, but if it's as easy to clean as the Airdog 3, it should be a breeze. Our Airdog 3 is now in my office. We recommend Airdog.